Adaptive equipment overload emergency control method based on automatic measure sensitivity identification

Abstract

The invention discloses an adaptive equipment overload emergency control method based on automatic measure sensitivity identification and belongs to the electric power system safety emergency control technology field. For equipment overload emergency control causing no power grid splitting, e.g., single break or same-station parallel equipment total break, when equipment overload is determined for the first time, equipment overload emergency control measure combinations are calculated according to a measure sensitivity initial value, power grid control is carried out, integrated measure sensitivity is reckoned according to the control effect, the integrated measure sensitivity is utilized to update sensitivity of other measures of a station to which a recently-applied measure is accessed, the equipment overload emergency control measure combinations are calculated, through reckoning sensitivity-calculation control measure iteration, equipment overload is eliminated. The method is advantaged in that control precision, timeliness and reliability are comprehensively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of power system safety emergency control, and more precisely, the invention relates to a method suitable for overload self-adaptive emergency control of power transmission equipment in a power system. Background technique [0002] Factors such as grid power generation, rapid changes in load, or switching on / off of grid equipment may lead to overloading of grid transmission lines and transformers. When the overload is serious, emergency control measures need to be taken to eliminate the overload of transmission equipment. For a single disconnection or parallel equipment with the same station (referring to multiple power transmission equipment with the same or different busbars at each end but connected together only through switches) full disconnection will cause overloading of the equipment that is disconnected from the grid. The sensitivity of the control measures is the same and does not change with the op...

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Problems solved by technology

[0003] However, for a single disconnection or all parallel disconnection of the same station equipment that will not cause overloading of the power grid, since the sensitivity of emergency control measures at different stations may vary and vary with the operating status of other equipment, if the sensitivity of the measures is set offline The scheme of equipment overload connection and switching will inevitably have a serious risk of over-control; if the equipment overload online control scheme based on the sensitivity of online grid state calculation measures is adopted, since it involves the grid online model and the real-time power flow of the grid, when the range of the grid online model and the grid operating state When the estimated accuracy of the method is not enough to fully reflect the sensitivity of the measure to equipment overload, this online control scheme also has a serious risk of over-control, and the generation speed of the online control strategy is not enough to cause the equipment to be disconnected due to the overload time being too long, causing further damage. For serious grid security issues

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